Tennis swing training device



FIG. 1 is front and left-side perspective view of a tennis swing training device embodying my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines are included for the purpose of illustrating a portion of the tennis swing training device that forms no part of the claimed design 

The ornamental design for a tennis swing training device, as shown and described. 